US 2465689 A
Description (OCR text may contain errors)
A. LANZ Mara, 29, 1949 WEAYING IN LOOMS COMPRISING A P ATTERN DEVICE Filed June 29, 1945' luvs/11101:;-
0 1w l. -HH Iii? Patented Mar. 29, 1949 UNITED STATES PATENT OFFICE WEAVING IN LOOMS COIWPRISING A PATTERN DEVICE Adolf Lanz, Wettingen, Switzerland, assignor to Baumwoll-Spinnerei Wettingen, Switzerland 3 Claims. 1
The invention relates to an arrangement for use with looms for producing woven effects as by conducting threads separated out from the warp over a guide member preferably constituted as an oscillatory member and which, during the weaving, is moved to and fro, so as to subject the threads to an alternating tension so that effects corresponding thereto will be produced in the fabric, the suitable selection of threads deflected out of the normal web of the remaining warp serving to effect a more or less pronounced wavy incorporation of the weft wherein the wavy portions may be of uniform or non-uniform configuration.
The oscillating lever is preferably disposed between the back rest that carries all of the warp threads and a lower back roller which serves solely for guiding the threads that are deflected out of the warp, and which therefore run per se to the normal upper back rest, so that the operating conditions necessary for producing the warp effect remain unchanged from full warp to empty warp conditions, whereas the warp remains unencumbered by the auxiliary means thus provided, besides which the supplementary arrangement can be subsequently applied without difficulty to modern looms, e, g. those provided with automatic warp-thread shut-down devices.
In accordance with the invention, the movement of the reciprocating guide member is effected by means of a shifting endless operating member which is associated with a pattern device already present on the loom.
In accordance with the invention therefore, the pattern device provided on the loom for controlling the weaving procedure has a supplementary function imparted to it which produces a corresponding simplification of the drive mechanism and its construction and supervision, but which nevertheless, in proportion to the length of the endless operating member (which may be constituted as a rod provided with cams or as a perforated paper card) permits the production of a large number of patterns in the form of less dense and more dense portion in the fabric. On the other hand, the shifting or adjusting of the pattern device already present on the loom serves at the same time to adjust the operating means provided by the present invention in correlation to the weaving as it proceeds on the loom.
An embodiment of the invention is illustrated in the drawing.
Fig. 1 serves for explaining the principle of the quired manner.
weaving method by showing parts that are necessary for this purpose in a vertical section;
Fig. 2 shows the control mechanism in eleva tion;
Fig. 3 is a partial side elevational view of Fig. 2, and
Fig. 4 shows a larger scale vertical section on the line IV-IV in Fig. 3.
In Figs. 1 and 2, the numeral l designates a shaft which is mounted at both ends in stationary bearings on the loom frame. A round rod 2 extends parallel with the shaft 1 at a certain distance apart from this shaft and has its ends fixed to the shaft l by means of connecting arms 3. By rocking the shaft I back and forth about its axis the round rod 2 is correspondingly swung about said axis, thereby to act as a rocking rod. The warp beam is designated by 4, the usual back rest or rail by 5, an additional back rest by 6 and a thread guiding roller or rail which is situated near to the warp beam 4, by I.
From the warp a thread groups I) are divided or leased off as indicated in chain dotted lines in Fig. 1, said thread groups passing away from the warp beam 4 across the roller 1 to the rocking rod 2 and the back rest 5. On the opposite side of the rocking rod 2 thread groups 0 which also had been leased off the warp a bear against said rod, as indicated in chain lines in Fig. 1, said thread groups passing away from the warp beam 4 across the roller 1, the rocking bar 2, and the back rest 5. The thread groups 12 and c are, therefore, diverted from the normal course of the warp threads a in different ways between the warp beam 4 and the weaving position, the warp threads passing away from the warp beam 4 across the additional back rest 6 and the usual back rest 5, as indicated in Fig. 1.
In Fig. 2, the numeral 68 denotes the shaft of a so-called card cylinder round which passes an endless pattern card or strip 59 from which'a dobby 10 which is associated with the loom is controlled, if the pattern strip 69 is equipped with pegs H that are inserted therein in the re- These pegs H are capacitated pivotally to displace out of inoperative position weighting levers 13 constituting healds on a axle 12 which is arranged in the frame of the dobby. As the weighting lever '13 swings back into inoperative position it lifts a lower tie-hook 14, in a known manner, which is connected with an upper tie-hook 16 by means of a pivoting member 15. The member 15 is supported by a rocking member TI which is mounted on an axle 18 and is operatively connected with two swing arms (not shown) by means of a tension rod 19. From said two swing arms a shaft is suspended by two cords. The two tie-hooks 14 and 16 each serve for cooperating with one of two rocking arms 80 and BI respectively which are mounted on corresponding axles 02 or B3 and are reciprocated in the operation of the loom, that is, the dobby, by
cam discs 80 and 85 respectively. These cam discs are carried in common by a driving shaft 86.
The rearmost rocking member 11 of a row of,
rockers in the dobby is reserved for purposes of the present invention and is used exclusively for such purposes. In accordance therewith on the pattern strip 09 the corresponding path of travel is reserved for pegs for carrying the present inthread groups passing thereover. 10
As soonas, due to cooperation of this shaft with the pattern strip 09 the rocking member 11 vention into effect. With a projection 01 on the.
said rocking member 11 for which no tension-rod 19 is provided engages a tension spring 88 for connecting said rocking member with a bell'crank lever 09.
The bell crank lever 09 which is mounted on a stationary axle 90 (Fig. 3) is in turn connected by means of a link 9| with a bolt 93' which interconnects two forked arms of a clutch control lever 94 which is mounted on a stationary bolt 95. The clutch control lever 94 is connected by means of two oppositely disposed pins 96 with a gear 91 which is loosely mounted'on a stationary axle 98 (Fig. 4) and can be. axially displaced against the influence of a compression spring 99. The hub of the gear 91 constitutes an element of a dog clutch for cooperation with a matingly constructed coupling element I00 which is arranged on said axle 90 for rotating thereabout but kept from axial displacement relative to this axle.
On the circumference of the clutch element I00 an auxiliary lever IOI is mounted which carries a roller I02 for cooperation with a locking disc I03 which is fixed to the axle 98. This disc is provided with two circumferential grooves I04 of rounded cross section for the reception of the auxiliary lever IOI. The auxiliary lever IOI is maintained in bearing engagement with the circumference of the locking disc I03 or is occasionally in engagement with either one of said kerfs I00. The tension spring I05 is attached to a bolt I09 which extends through a longitudinal slot E01 in a side arm I08 on the clutch element I00.
The bolt I06 carrying the locking disc I03 is engaged by means of a spherical head by a rod I09, along a longitudinal slot in said rod an extension II 0 being adjustable the other end of which engages 'by means of a bolt III a lever II2 which is fixed to the shaft I carrying the rocker bar 2, the said bolt III being adjustable along a longitudinal slot in a lever II2.
The gear 91 being axially displaceably arranged on the fixed axle 98 is positively operatively connected via three pairs of gears I I3, H4, H5 and a chain I It with the card cylinder 68 of the pattern device. By means of the chain H6 and the pairs of gears I I3, I I4 and I I 5 the rotational movement of card cylinder 58 is transmittedto the gear 91 in accordance with the ratioof gearing provided. This 'ratio 'of gearing can if desired be varied by interchangi t p irs of gears H4 and II5to which end these pairs of gears are detachably secured by means of a slot II8 on a common carrier II! which is arranged on the loom frame.
In the operation of the loom the card cylinder 68 and thus the pattern strip 69 is advanced'step by step from the drive of the loom, in a known manner. The card cylinder 60 positively transmitsrotational movement via the chain H0 and is moved upwardly, the gear 91 is axially displaced in such fashion via the tension spring 88, the bell crank lever 89, the link 9| and the clutch control lever 94 as to be disengaged from the clutch element I00, in consequence whereof, ac- -tuation of the rocking rod 2 does not take place.
At this time the clutch element I00 is in an angular position in which the auxiliary lever IOI being carried by said element has entered into engagement by means of the associated roller'I02 with one of the kerfs in the locking disc I03, whereby the control arm I08 remains temporarily locked in position.
The gear 91 then rotates without taking 'along th'e'clutch element I00 until after having per formed half a turn the dogs on the hub of said gear '91 enter between the dogs of the clutch element I00, due to the gear 91 shifting axially to a corresponding extent by action of the compression spring 99, provided that the rocking member 11 allows of this shifting movement to take place. The clutch element I00 is then carried along with the gear 91 again and the control arm I08 is further pivotally displaced until by action of a peg II on the pattern strip 09 the disconnecting of the gear 91 from the clutch element I00 takes place in the described manner anew. By accordingly choosing the relative distance between the pegs onthe endless pattern strip 69 one is enabled to provide for the disconnecting of the gear 91 from. the coupling element I00 to beefiected at variable time periods apart and thus to determine the corresponding movement of the rocking rod 2 dependent upon the patterning of the weave as required.
If for any purpose of manufacture, for example, if weft thread breakage arises or if faulty Weaving must be eliminated from the weave, so that the person attending to the loom must turn a handwheel (not shown) on the shaft 68 the control device for the shaft I, that is, for the rocking rod 2 is positively adjusted to there,- quired extent at the same time. Therefore, the card cylinder and the control means for the rocking rod 2 remain coordinated witheach other for cooperation. I
Due to the provision of deriving the driving movement/for the rocking rod 2 from the card cylinder 68, that is, from the pattern. device of the dobby forthe control of the rocking rod '4! relatively little power is required. I Instead of. using a single rocker for cooperation with thread groups having been diverted from the normal course several such rockers may, be
employed. The present invention can be applied to a Jacquard-device operated machine in an analogous manner as hereinbefore described for a dobby, as will be readily understood without. any further comment,
1. In 'a loom apparatus, an operating mecha; nism for producing woveneffects, comprising a swinging member 2 over'which threads I); c
diverted out of the warp a are passed, and a clutch having two portions 91, I00, one portion of which 91 is controlled by an auxiliary swinging member 11 of a, dobby l0, and the other portion I00 of which effects movement of the swinging member 2 through agency of a card cylinder 68 of the dobby 10.
2. An operating mechanism for a loom apparatus according to claim 1, and in which a supplementary drive ll3--| I6 is provided between the clutch portion 91 and said card cylinder 68 of said dobby 10 for the purpose of effecting a, positively actuated driving connection.
3. An operating mechanism for a loom apparatus according to claim 2, and in which said clutch portion I00 is provided with a springloaded engaging member [0| for engaging with a locking disk I03.
6 REFERENCES ormn The following references are of record in the file of this patent:
UNITED STATES PATENTS